Dow took its losing streak to six days, and has now fallen in 12 of the past 13 days. The WSJ points out that the last time the Dow suffered as many losses over a 13-day stretch was in October 1974, at the nadir of that decade’s bear market.

What should also concern investors and market commentators is that this selling has occurred amid the heaviest trading volumes of the year. The NYSE had its fourth straight day in which at least four billion shares were traded.